justices will also consider the 1996 defense of marriage act or doma that prohibits federal recognition of same-sex marriages. the central claim in both cases is that plaintiffs were denied equal protection of the law. later today a panel of attorneys who have been active in the debate and litigation will give a preview of what to expect by the high court. the event is hosted by george washington university law school, and you can see it live beginning at 4 p.m. eastern on c-span. >> tonight on "first ladies," called a bigamist and adulterer, rachel jackson dies of an apparent heart attack before andrew jackson takes office. his niece, emily donaldson, becomes the white house hostess but is later dismissed as fallout from a scandal. and during the next administration, angelica van buren is the white house hostess for her father-in-law, president martin van buren, who is a widower. of live tonight at 9 eastern on c-span and c-span3, also on c-span radio and c-span.org. >> a hearing now by a house foreign affairs subcommittee on the threat of hezbollah, the lebanon-based islamic militant